ISR has a great track record of success with its Basic Street Series Suspension arms for the Nissan 240sx, but the aftermarket auto parts dealer doesn’t just stop there. This is why ISR upped its car suspension game by creating the Performance Pro Series Suspension Arm Package for Nissan 240SX 89-94 S13 — a product that sets a new standard for modulating the sensitive Nissan 240sx suspension system.